Yes, but this is potentially a dangerous time as you and your team may, unwittingly come into contact with an infectious person / fomite.
Every effort should be made to prevent ill persons from entering the clinic, without negatively impacting animal welfare. If a horse owner currently has respiratory symptoms or is a suspected or confirmed case of COVID-19, they should not visit the veterinary facility. If possible, a healthy friend or family member from outside their household should bring the horse to the veterinary hospital. The clinic should use all appropriate precautions to minimize contact with the person bringing the horse to the clinic. One technique is to have a stable or section of stables, close to the lorry park, designated for handover. The client can telephone on arrival, and be instructed to unload the horse and put it in this stable. They can then return to the lorry and drive away, and your team can then retrieve the horse and put it wherever is most appropriate within your hospital. Ensure that your horse naming system (eg mane tags, pastern bands, etc) is functioning accurately. An alternative is to ask the client to remain in their lorry, and for your team to get the horse off the lorry or out of the trailer.
Be aware that head collars, lead reins and other tack could act as fomites and be sources of the SARS-CoV-2 virus if the owner / trainer is an asymptomatic or presymptomatic shedder (viable virus can persist on cloth for 24 hours). It is advisable that gloves should be worn when touching such items.